Science (Video)

The International System of Units (the SI), the modern metric system, has recently undergone its most revolutionary change since its origins during the French Revolution. The nature of this revolution is that all of the base units of the SI are now defined by fixing values of natural constants. Our measurement system is now, both philosophically and practically, strongly quantum. Nobel Prize recipient William Phillips, Ph.D., a Distinguished University and College Park Professor of Physics at the University of Maryland, talks about why this reform was needed and how it is done. Series: "UC Berkeley Graduate Lectures" [Science] [Show ID: 37728]

Climate change is one of the hallmarks of the Anthropocene. Rising global temperatures are having profound effects on ecosystems and the organisms that inhabit them, including disease-causing organisms such as viruses, bacteria, and parasitic worms. However, much less is known about the potential for infectious agents to contribute to changes in climate. Many infectious agents have the potential to affect greenhouse gas emissions via effects on their hosts. In her talk, Vanessa Ezenwa explores the idea that interactions between climate change and infectious diseases are not solely unidirectional, specifically, that climate change can increase disease prevalence in human and animal populations, but disease, in turn, may exacerbate climate change. Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Health and Medicine] [Humanities] [Science] [Show ID: 37774]

Dr. B.S. Manjunath, distinguished professor in the Department of Electrical & Computer Engineering at UC Santa Barbara, discusses the use of computer video technology to assist with visual analysis of issues like human stress and disease, methane gas release, and underwater mapping. He also discusses what we know about human vision, how it works compared to how computer vision works. Series: "GRIT Talks" [Science] [Show ID: 37871]

This century is the first in Earth's history when the catastrophic threats to the entire planet can be induced by one species, humans. We have an ever-heavier collective footprint on the planet. We’re empowered by ever more powerful technologies that can be hugely beneficial, but which if misapplied could trigger calamitous setbacks to civilization. Such events could be global: we’re so interconnected that no continent would be unscathed. It’s an ethical indictment of humanity that the gap between the actual state of the world, and the way it could be, is widening rather than narrowing. COVID-19 has been a wake-up call. It has shown that our increasingly interconnected civilization is vulnerable - but also that well-directed science can be our salvation. Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Humanities] [Science] [Show ID: 37777]

At the beginning of the 20th century, Einstein changed the way we think about time. Now, early in the 21st century, the measurement of time is being revolutionized by the ability to cool a gas of atoms to temperatures millions of times lower than any naturally occurring temperature in the universe. Nobel Prize recipient William Phillips, Ph.D., a Distinguished University and College Park Professor of Physics at the University of Maryland, talks about laser cooling and ultracold atoms and how they relate to time.

Atomic clocks, the best timekeepers ever made, are one of the scientific and technological wonders of modern life. Such super-accurate clocks are essential to industry, commerce, and science; they are the heart of the Global Positioning System (GPS), which guides cars, airplanes, and hikers to their destinations. Today, the best primary atomic clocks use ultracold atoms. Series: "UC Berkeley Graduate Lectures" [Science] [Show ID: 37727]

Connections between past and present human exploitation of the environment, the coming crisis of the Anthropocene and what we humans can do to alleviate the crisis. Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Humanities] [Science] [Show ID: 37773]

This talk considers the effects of the most aggressive ants on the environment, arguing that certain invasive species resemble humans in their capacity for global conquest and environmental destructiveness.  Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Humanities] [Science] [Show ID: 37772]

Michele De Luca, MD, shares his research in gene therapy for epidermolysis bullosa and cell therapy for ocular burns. Series: "Stem Cell Channel" [Health and Medicine] [Science] [Show ID: 37671]

Dr. Todd Oakley, evolutionary biologist and professor in the Department of Ecology, Evolution, and Marine Biology at UC Santa Barbara, discusses his research on the evolutionary origins of complex features, like eyes, bioluminescence, and nervous systems. Series: "GRIT Talks" [Science] [Show ID: 37868]

A model of human cortical development could be used to instruct novel computational learning approaches. Alysson Muotri, Phd, Sujeeth Bharadwaj, PhD, Weiwei Yang, and Gabrial Silva, MSc, PhD, discuss the promise, the problems, and the potential when biology and artificial intelligence meet. Series: "Stem Cell Channel" [Health and Medicine] [Science] [Show ID: 37556]